/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package Utils;
import javax.swing.*;
import javax.swing.text.*;
/**
 *
 * @author borysfan
 */
public class TextFieldFilterDays extends PlainDocument {

   public static final String LOWERCASE  =
        "abcdefghijklmnopqrstuvwxyz";
   public static final String UPPERCASE  =
        "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
   public static final String ALPHA   =
        LOWERCASE + UPPERCASE;
   public static final String NUMERIC =
        "0123456789";
   public static final String FLOAT =
        NUMERIC + ".";
   public static final String ALPHA_NUMERIC =
        ALPHA + NUMERIC;



   protected String acceptedChars = null;
   protected boolean negativeAccepted = false;

   public TextFieldFilterDays() {
     this(ALPHA_NUMERIC);
   }

   public TextFieldFilterDays(String acceptedchars) {
     acceptedChars = acceptedchars;
   }

   public void setNegativeAccepted(boolean negativeaccepted) {
     if (acceptedChars.equals(NUMERIC) ||
         acceptedChars.equals(FLOAT) ||
         acceptedChars.equals(ALPHA_NUMERIC)){
         negativeAccepted = negativeaccepted;
        acceptedChars += "-";
        }
      }

    @Override
   public void insertString(int offset, String  str, AttributeSet attr) throws BadLocationException {
     if (str == null) return;

     if (acceptedChars.equals(UPPERCASE))
        str = str.toUpperCase();
     else if (acceptedChars.equals(LOWERCASE))
        str = str.toLowerCase();

     for (int i=0; i < str.length(); i++) {
        if (acceptedChars.indexOf(str.valueOf(str.charAt(i))) == -1)
            return;
     }

     if (acceptedChars.equals(FLOAT) || (acceptedChars.equals(FLOAT + "-") && negativeAccepted)) {
        if (str.indexOf(".") != -1) {
           if (getText(0, getLength()).indexOf(".") != -1) {
              return;
           }
        }
     }

     if (negativeAccepted && str.indexOf("-") != -1) {
        if (str.indexOf("-") != 0 || offset != 0 ) {
           return;
        }
     }

     try{
         int value=Integer.parseInt(str);
         if(value<1 && value >31)
             return;
     }catch(NumberFormatException exc){
         return;
     }


     super.insertString(offset, str, attr);
   }
}